23111221400 has 48 divisors (see below), whose sum is σ = 53855091000. Its totient is φ = 9223585280.

The previous prime is 23111221391. The next prime is 23111221417. The reversal of 23111221400 is 412211132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41825 + ... + 219024.

Almost surely, 2^23111221400 is an apocalyptic number.

23111221400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23111221400 is an abundant number, since it is smaller than the sum of its proper divisors (30743869600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23111221400 is a wasteful number, since it uses less digits than its factorization.

23111221400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261308 (or 261299 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 23111221400 its reverse (412211132), we get a palindrome (23523432532).

The spelling of 23111221400 in words is "twenty-three billion, one hundred eleven million, two hundred twenty-one thousand, four hundred".